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Made with the fossilized remains of microscopic organisms a diatomaceous earth filter (better known as a DE filter) is a very effective type of mechanical water filter. The tiny particles of diatomaceous earth can filter down to 1-2 micros, providing excellent filtration for a variety of projects. At Pentair Aquatic Eco-Systems, we carry DE filters made of injection-molded, high-strength material, giving you strong and durable service. Call 877-347-4788 to discuss diatomaceous filters and whether this type of system will be best for your water filtration needs.